Finder
O-Ring Size Finder
Search nominal measurements to find the closest AS568 dash number. This tool is for dimensional identification, not compatibility certification.
Search by measurement
Find the closest AS568 size
Enter nominal inside diameter and cross-section. The finder ranks the closest standard dimensions without claiming material or application compatibility.
How matching works
The finder compares your ID and cross-section against the 349 main-table AS568 nominal sizes and ranks the closest candidates. Cross-section matters: two rings with similar ID but different cross-sections may not fit the same gland.